rresvport_af
int rresvport_af(int *, int);
PROTO_NORMAL(rresvport_af);
s = rresvport_af(&lport, r->ai_family);
int s2 = rresvport_af(&lport, af), s3;
DEF_WEAK(rresvport_af);
return rresvport_af(alport, AF_INET);
s = rresvport_af(&lport, r->ai_family);